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Zhang H, Liu L, Sharma R, Alfieri A, Saha S, Garg M, Kalnicki S, Chen W, Sanghvi N, Guha C. High Intensity Focused Ultrasound (HIFU)-enhanced Autologous in situ Vaccination for Prostate Cancer. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Xiao J, Gao Y, Zhang X, Lu D, Hu W, Gao M, Chen W, Zou Y. High resolution flat crystal spectrometer for the Shanghai EBIT. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:093101. [PMID: 19044398 DOI: 10.1063/1.2970942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report on a high resolution flat crystal spectrometer designed for the Shanghai EBIT. Its energy range is from 0.5 to 10 keV. Three crystals can be installed in the vacuum chamber simultaneously, and its effective Bragg angle can be covered from 15 degrees to 75 degrees . A vacuum version charge-coupled device detector is used for detection of photons. An energy resolution under 1 eV was reached in measurements of the 4.5 keV Kalpha(1) line by using an x-ray generator with a titanium anode. The spectrometer was also tested to operate well on the Shanghai EBIT by observing the lines of tungsten at around 3.2 keV.
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Lin Y, Wang L, Yang S, Lin J, Lin T, Chen W, Wang H, Jiang J, Chao Y, Yen S. Preoperative Chemoradiotherapy with Oral Tegafur-Uracil and Leucovorin in Elderly Patients with Rectal Cancer. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kryukov AK, Petrov VS, Averyanova LS, Osipov GV, Chen W, Drugova O, Chan CK. Synchronization phenomena in mixed media of passive, excitable, and oscillatory cells. CHAOS (WOODBURY, N.Y.) 2008; 18:037129. [PMID: 19045503 DOI: 10.1063/1.2956985] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We study collective phenomena in highly heterogeneous cardiac cell culture and its models. A cardiac culture is a mixture of passive (fibroblasts), oscillatory (pacemakers), and excitable (myocytes) cells. There is also heterogeneity within each type of cell as well. Results of in vitro experiments are modelled by Luo-Rudy and FitzHugh-Nagumo systems. For oscillatory and excitable media, we focus on the transitions from fully incoherent behavior to partially coherent behavior and then to global synchronization as the coupling strength is increased. These regimes are characterized qualitatively by spatiotemporal diagrams and quantitatively by profiles of dependence of individual frequencies on coupling. We find that synchronization clusters are determined by concentric and spiral waves. These waves arising due to the heterogeneity of medium push covered cells to oscillate in synchrony. We are also interested in the influence of passive and excitable elements on the oscillatory characteristics of low- and high-dimensional ensembles of cardiac cells. The mixture of initially silent excitable and passive cells shows the transitions to oscillatory behavior. In the media of oscillatory and passive or excitable cells, the effect of oscillation death is observed.
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Dong H, Chen J, Chen W. In vitro enhancing effects of thymic dendritic cells on apoptotic cell death of thymocytes. SCIENCE IN CHINA. SERIES C, LIFE SCIENCES 2008; 41:87-92. [PMID: 18726275 DOI: 10.1007/bf02882710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/1997] [Indexed: 11/28/2022]
Abstract
Using terminal deoxynucleotide transferase-mediated dUTP-digoxigenin nick end labeling (TUNEL) assay and propidium iodide-DNA staining flow cytometry assay, the effects of mouse thymic dendritic cells (MTSC4) on the process of programmed cell death of thymocytes in vitro were investigated. It was noticed that thymocytes bound to MTSC4 used in this study. That the percentages of apoptotic nuclei of the bound thymocytes on MTSC4 were much higher than those of medium-cultured thymocytes, while the bound thymocytes on mouse thymic epithelial cell (MTEC1) showed much lower percentages of apoptosis. FACS analysis quantitatively confirmed the observation. Phenotype analysis showed that MTSC4 induced the deletion of CD4 + CD8 + cells and CD4 + CD8-.cells in 18 h of coculture. The results suggest that the negative selection of medullary thymocytes may be achieved by thymic dendritic cells through their enhancing effects on apoptosis.
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Dong H, Chen J, Chen W. Membrane molecules in induction of apoptosis of thymocytes by mouse thymic dendritic cells which express Fas ligands. SCIENCE IN CHINA. SERIES C, LIFE SCIENCES 2008; 41:189-94. [PMID: 18726205 DOI: 10.1007/bf02882726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/1997] [Indexed: 11/30/2022]
Abstract
Apoptosis of thymocytes is involved in the negative selection of thymus, but it remains unclear how the cell death of thymocytes is regulated by the thymic stromal cells. By using immunohistochemistry, TdT-mediated dUTP nick end labeling (TUNEL) and flow cytometry methods, it was found that Fas ligand was expressed in the thymic medulla and a mouse thymic medullary type dendritic cell line (MTSC4). The DNA fragmentation and TUNEL positive staining of thymocytes were detected in 6 h of cocultures with MTSC4. 97 % of the thymocytes which bound to MTSC4 were Fas antigen positive cells. The DNA fragmentation of thymocytes induced by MTSC4 was inhibited by the addition of 20 mmol/L N-acetyl galactosamin monosaccharide and the pretreatment of a monoclonal antibody (PF-18-3) which recognized a putative antigen on MTSC4. These results suggested that the mechanisms of induction of cell death by stromal cells may include the interactions of multiple cell surface molecules, in addition to the Fas/Fas ligand system.
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Xue F, Chen W, Ramya S. Structure of dengue virus – implications for flaviviral assembly and opportunities for drug design. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308092611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Carini G, Chen W, Li Z, Rehak P, Siddons D, Patel J, Steen S, Haensch W. Monolithic active-matrix silicon X-ray detectors. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308094774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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1334
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Erdogan F, Larsen LA, Zhang L, Tümer Z, Tommerup N, Chen W, Jacobsen JR, Schubert M, Jurkatis J, Tzschach A, Ropers HH, Ullmann R. High frequency of submicroscopic genomic aberrations detected by tiling path array comparative genome hybridisation in patients with isolated congenital heart disease. J Med Genet 2008; 45:704-9. [PMID: 18713793 DOI: 10.1136/jmg.2008.058776] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Congenital heart disease (CHD) is the most common birth defect and affects nearly 1% of newborns. The aetiology of CHD is largely unknown and only a small percentage can be assigned to environmental risk factors such as maternal diseases or exposure to mutagenic agents during pregnancy. Chromosomal imbalances have been identified in many forms of syndromic CHD, but very little is known about the impact of DNA copy number changes in non-syndromic CHD. METHOD A sub-megabase resolution array comparative genome hybridisation (CGH) screen was carried out on 105 patients with CHD as the sole abnormality at the time of diagnosis. RESULTS There were 18 chromosomal changes detected, which do not coincide with common DNA copy number variants, including one de novo deletion, two de novo duplications and eight familial copy number variations (one deletion and seven duplications). CONCLUSIONS Our data show that submicroscopic deletions and duplications play an important role in the aetiology of this condition, either as direct causes or as genetic risk factors for CHD. These findings have immediate consequences for genetic counselling and should pave the way for the elucidation of the pathogenetic mechanisms underlying CHD.
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Bhuiyan AR, Chen W, Srinivasan SR, Rice JC, Mock NB, Tang R, Gene Bond M, Boerwinkle E, Berenson GS. Interaction of G-protein beta3 subunit and nitric oxide synthase gene polymorphisms on carotid artery intima-media thickness in young adults: the Bogalusa Heart Study. Am J Hypertens 2008; 21:917-21. [PMID: 18551105 DOI: 10.1038/ajh.2008.188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND G-protein beta3 subunit (GNB3) gene C825T and endothelial nitric oxide (eNOS) gene G894T polymorphisms both influence arterial structure and function. However, information is scant regarding the interaction of these genes on arterial wall thickness. METHODS This aspect was examined in 654 white and black subjects, aged 25-43 years (72.9% white, 39.3% male). Arterial wall thickness was assessed in terms of the average intima-media thickness (IMT) of common carotid, internal carotid, and carotid bulb segments by B-mode ultrasonography. RESULTS Frequencies of T allele of the GNB3 C825T polymorphism (0.718 vs. 0.304, P < 0.0001) and G allele of the eNOS G894T polymorphism (0.868 vs. 0.661, P < 0.0001) were higher in blacks compared to whites. In a multivariate model including gender, age, mean arterial pressure, body mass index, triglycerides/HDL cholesterol ratio, insulin resistance index, smoking, and/or race, there was no significant genotypic effect on carotid IMT with respect to GNB3 C825T or eNOS G894T polymorphisms among whites, blacks, and total sample. However, the carriers of TT genotype of the GNB3 C825T and T allele of the eNOS G894T had a significantly lower carotid IMT among blacks (P = 0.003) and the total sample (P = 0.006). CONCLUSION These results indicate that the genetic variations of the eNOS gene in combination with the GNB3 gene jointly influence carotid artery wall thickening process in young adults, especially in blacks.
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Andreeff M, Ruvolo V, Gadgil S, Zeng C, Coombes K, Chen W, Kornblau S, Barón AE, Drabkin HA. HOX expression patterns identify a common signature for favorable AML. Leukemia 2008; 22:2041-7. [PMID: 18668134 DOI: 10.1038/leu.2008.198] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Deregulated HOX expression, by chromosomal translocations and myeloid-lymphoid leukemia (MLL) rearrangements, is causal in some types of leukemia. Using real-time reverse transcription-PCR, we examined the expression of 43 clustered HOX, polycomb, MLL and FLT3 genes in 119 newly diagnosed adult acute myeloid leukemias (AMLs) selected from all major cytogenetic groups. Downregulated HOX expression was a consistent feature of favorable AMLs and, among these cases, inv(16) cases had a distinct expression profile. Using a 17-gene predictor in 44 additional samples, we observed a 94.7% specificity for classifying favorable vs intermediate/unfavorable cytogenetic groups. Among other AMLs, HOX overexpression was associated with nucleophosmin (NPM) mutations and we also identified a phenotypically similar subset with wt-NPM. In many unfavorable and other intermediate cytogenetic AMLs, HOX levels resembled those in normal CD34+ cells, except that the homogeneity characteristic of normal samples was not present. We also observed that HOXA9 levels were significantly inversely correlated with survival and that BMI-1 was overexpressed in cases with 11q23 rearrangements, suggesting that p19(ARF) suppression may be involved in MLL-associated leukemia. These results underscore the close relationship between HOX expression patterns and certain forms of AML and emphasize the need to determine whether these differences play a role in the disease process.
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Fujise O, Wang Y, Chen W, Chen C. Adherence of Aggregatibacter actinomycetemcomitans via serotype-specific polysaccharide antigens in lipopolysaccharides. ACTA ACUST UNITED AC 2008; 23:226-33. [PMID: 18402609 DOI: 10.1111/j.1399-302x.2007.00416.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Gram-negative Aggregatibacter actinomycetemcomitans is recognized as an important periodontal pathogen. A striking property of this bacterium is its ability to form a tenacious biofilm adhering to abiotic surfaces. Both fimbrial and non-fimbrial adhesins are believed to be responsible for this ability. In our study, specific markerless mutants in the biosynthesis genes of cell surface polysaccharides were constructed with the Cre-loxP recombination system to identify non-fimbrial adhesin(s). METHODS Non-fimbriated A. actinomycetemcomitans strain ATCC29523 (serotype a) was used to construct a deletion mutant of serotype-a specific polysaccharide antigen (SPA-a) in lipopolysaccharide (LPS). The LPS was purified through a polymyxin B column following phenol extraction, and verified by silver staining following sodium dodecyl sulfate-polyacrylamide gel electrophoresis and by immunoblot analysis using rabbit antisera raised against SPA-a. Strains were grown in broth for 2 days and examined for the adherence of bacterial cells on the glass surface. RESULTS Strain ATCC29523 formed a thin film of bacterial growth on the glass surface. The deletion of SPA-a affected its ability to form this thin film. When this mutant was rescued with the wild-type SPA-a gene cluster, its adherence-positive phenotype was restored. CONCLUSION SPA-a in the LPS molecule appears to promote the adherence of A. actinomycetemcomitans cells to abiotic surfaces.
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Luo JH, Chen W, Sun JJ, Xie D, Mo JC, Zhou L, Lu J. Laparoscopic Management of Mullerian Duct Remnants: Four Case Reports and Review of the Literature. ACTA ACUST UNITED AC 2008; 29:638-42. [DOI: 10.2164/jandrol.108.005496] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Rathore A, Wang W, Chen W, Marten M. American Chemical Society: Division of Biochemical Technology (BIOT). Biotechnol Prog 2008. [DOI: 10.1021/bp080141l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ma J, Wang L, Zhang W, Chen W, Zhao C, Smales RJ. Comparative evaluation of micro-implant and headgear anchorage used with a pre-adjusted appliance system. Eur J Orthod 2008; 30:283-7. [DOI: 10.1093/ejo/cjm128] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Hsieh H, Chang S, Yuan J, Pino-y-Torres J, Chen W. SU-GG-T-479: Dosimetric Comparison of Whole Breast Irradiation Using Helical Tomographic Technique and Static Multileaf Collimated Field-In-Field Technique. Med Phys 2008. [DOI: 10.1118/1.2962228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Yuan J, Chen W, Jette D. SU-GG-T-499: Deterministic Photon Kerma Distribution Based On the Boltzmann Equation for External Beam Radiation Therapy. Med Phys 2008. [DOI: 10.1118/1.2962248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Bhooshan N, Giger M, Chen W, Jansen S, Li H, Lan L, Newstead G. SU-HH-AUD C-07: Classification of Breast Carcinoma Subtypes Using Computer-Extracted Morphological and Kinetic Features in DCE-MRI. Med Phys 2008. [DOI: 10.1118/1.2962314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Liang X, Tolar J, Miller JS, LeBien TW, Blazar BR, Chen W. Toll-like receptor 7 agonist induces apoptosis of human B-lineage acute lymphocytic leukemia cells in vitro and in vivo. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.3033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Madajewicz S, Fan T, Zeng W, Zarrabi M, Zucker S, Zhao Q, Lu J, Seibel M, Chen W. Gene expression signature of circulating tumor cells (CTC) in patients with colorectal carcinoma (CRC). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Gadgeel SM, Ruckdeschel JC, Wozniak A, Patel B, Heilbrun LK, Chen W, Venkat R, Chaplen R, Turrisi A. Pemetrexed and cisplatin with concurrent thoracic radiation therapy (TRT) followed by docetaxel in stage III non-small cell lung cancer (NSCLC) patients (pts). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.7569] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Chen W. Effects of low-protein diet plus α-keto acid on micro-inflammation and the relationship between micro-inflammation and nutritional status in patients performing continuous ambulatory peritoneal dialysis: a randomized controlled trial. ACTA ACUST UNITED AC 2008; 6:473-7. [DOI: 10.3736/jcim20080508] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Asherson P, Zhou K, Anney RJL, Franke B, Buitelaar J, Ebstein R, Gill M, Altink M, Arnold R, Boer F, Brookes K, Buschgens C, Butler L, Cambell D, Chen W, Christiansen H, Feldman L, Fleischman K, Fliers E, Howe-Forbes R, Goldfarb A, Heise A, Gabriëls I, Johansson L, Lubetzki I, Marco R, Medad S, Minderaa R, Mulas F, Müller U, Mulligan A, Neale B, Rijsdijk F, Rabin K, Rommelse N, Sethna V, Sorohan J, Uebel H, Psychogiou L, Weeks A, Barrett R, Xu X, Banaschewski T, Sonuga-Barke E, Eisenberg J, Manor I, Miranda A, Oades RD, Roeyers H, Rothenberger A, Sergeant J, Steinhausen HC, Taylor E, Thompson M, Faraone SV. A high-density SNP linkage scan with 142 combined subtype ADHD sib pairs identifies linkage regions on chromosomes 9 and 16. Mol Psychiatry 2008; 13:514-21. [PMID: 18180756 DOI: 10.1038/sj.mp.4002140] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
As part of the International Multi-centre ADHD Genetics project we completed an affected sibling pair study of 142 narrowly defined Diagnostic and Statistical Manual of Mental Disorders, fourth edition combined type attention deficit hyperactivity disorder (ADHD) proband-sibling pairs. No linkage was observed on the most established ADHD-linked genomic regions of 5p and 17p. We found suggestive linkage signals on chromosomes 9 and 16, respectively, with the highest multipoint nonparametric linkage signal on chromosome 16q23 at 99 cM (log of the odds, LOD=3.1) overlapping data published from the previous UCLA (University of California, Los Angeles) (LOD>1, approximately 95 cM) and Dutch (LOD>1, approximately 100 cM) studies. The second highest peak in this study was on chromosome 9q22 at 90 cM (LOD=2.13); both the previous UCLA and German studies also found some evidence of linkage at almost the same location (UCLA LOD=1.45 at 93 cM; German LOD=0.68 at 100 cM). The overlap of these two main peaks with previous findings suggests that loci linked to ADHD may lie within these regions. Meta-analysis or reanalysis of the raw data of all the available ADHD linkage scan data may help to clarify whether these represent true linked loci.
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Chen W, Chen H, Xia Y, Zhao J, Tian F, Zhang H. Production, Purification, and Characterization of a Potential Thermostable Galactosidase for Milk Lactose Hydrolysis from Bacillus stearothermophilus. J Dairy Sci 2008; 91:1751-8. [DOI: 10.3168/jds.2007-617] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shen Y, Lu P, Hu X, Tong X, Chen W. The plasma IL-18, MIP-1α, MCP-1, SDF-1 and rantes in patients with majior depression. Eur Psychiatry 2008. [DOI: 10.1016/j.eurpsy.2008.01.470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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